Selenocysteine - Study guides, Class notes & Summaries

The chirality of an amino acid results from the fact that its α carbon: A) has no net charge. B) is a carboxylic acid. C) is bonded to four different chemical groups. D) is in the L absolute configuration in naturally occurring proteins. E) is symmetric. C) is bonded to four different chemical groups. Of the 20 standard amino acids, only ___________ is not optically active. The reason is that its side chain ___________. A) alanine; is a simple methyl group B) glycine; is a hydrog...

Biochemistry 1 Exam 1 NWHSU L - Answer- The configuration at the alpha-carbon of the vast majority of naturally occurring amino acid is? D - Answer- Which amino acids are not biologically active? Glutamate (Glu) Negatively charged R group - Answer- Apspartate (Asp) Negatively charged R group - Answer- Lysine (Lys) Positively charged R group - Answer- Alanine (Ala) Non-polar, Aliphatic - Answer- Glycine (Gly) Non-polar, Aliphatic - Answer- Isoleucine (Ile) Non-...

NWHSU Biochemistry 1 Exam What are the four bio molecules? - Answer- Amino acids/proteins Carbohydrates Nucleotides/Nucleic acids Lipids The solvent in bio chemistry is what? - Answer- Water Zwitter ion - Answer- has a positive and negative charge True or false: Most amino acids are chiral compounds? - Answer- True! (exception = glycine) Alpha amino acids consist of a ____ and a ____ - Answer- amine and a COO- group aromatic amino acids absorb_____ - Answer- UV light =2...

Biochemistry: Concepts and Connections (Appling et al.) Chapter 1 Biochemistry and the Language of Chemistry 1) The water content in the human body is approximately: A) 90%. B) 80%. C) 70%. D) 60%. E) 50%. Answer: C 2) The four most abundant chemical elements in living systems are: A) hydrogen, oxygen, sulfur and phosphorus. B) hydrogen, carbon, nitrogen and oxygen. C) sodium, potassium, carbon and oxygen. D) sodium, potassium, nitrogen and sulfur. E) carbon, nitrogen, oxygen and potassium. Answ...

Biochemistry: Concepts and Connections (Appling et al.) Chapter 1 Biochemistry and the Language of Chemistry 1) The water content in the human body is approximately: A) 90%. B) 80%. C) 70%. D) 60%. E) 50%. Answer: C 2) The four most abundant chemical elements in living systems are: A) hydrogen, oxygen, sulfur and phosphorus. B) hydrogen, carbon, nitrogen and oxygen. C) sodium, potassium, carbon and oxygen. D) sodium, potassium, nitrogen and sulfur. E) carbon, nitrogen, oxygen and potassium. Answ...

In a bacterial cell, the DNA is in the: A) cell envelope. B) cell membrane. C) nucleoid. D) nucleus. E) ribosomes. nucleoid A major change occurring in the evolution of eukaryotes from prokaryotes was the development of: A) DNA. B) photosynthetic capability. C) plasma membranes. D) ribosomes. E) the nucleus the nucleus In eukaryotes, the nucleus is enclosed by a double membrane called the: A) cell membrane. B) nuclear envelope. C) nucleolus. D) nucleoplasm. E) nucl...

In a bacterial cell, the DNA is in the: A) cell envelope. B) cell membrane. C) nucleoid. D) nucleus. E) ribosomes. nucleoid A major change occurring in the evolution of eukaryotes from prokaryotes was the development of: A) DNA. B) photosynthetic capability. C) plasma membranes. D) ribosomes. E) the nucleus the nucleus 00:34 01:10 In eukaryotes, the nucleus is enclosed by a double membrane called the: A) cell membrane. B) nuclear envelope. C) nucleolus. D) nuc...

TestBank Lehninger Principles of Biochemistry 7e Nelson TB TestBank Lehninger Principles of Biochemistry 7e Nelson TBPage 1 1. In a bacterial cell, the DNA is in the: A) cell envelope. B) cell membrane. C) nucleoid. D) nucleus. E) ribosomes. 2. A major change occurring in the evolution of eukaryotes from prokaryotes was the development of: A) DNA. B) photosynthetic capability. C) plasma membranes. D) ribosomes. E) the nucleus. 3. In eukaryotes, the nucleus is enclosed by a d...

OpenStax Microbiology Test Bank Chapter 11: Mechanisms of Microbial Genetics Chapter 11: Mechanisms of Microbial Genetics * = Correct answer Multiple Choice 1. Gene expression includes which of the following? A. DNA replication B. replication, transcription, and translation C. transcription and translation* D. translation only Difficulty: Easy ASM Standard: N/A 2. The central dogma describes which of the following? A. the process by which enzymes are modified after translation B. t...

OpenStax Microbiology Test Bank Chapter 11: Mechanisms of Microbial Genetics Chapter 11: Mechanisms of Microbial Genetics * = Correct answer Multiple Choice 1. Gene expression includes which of the following? A. DNA replication B. replication, transcription, and translation C. transcription and translation* D. translation only Difficulty: Easy ASM Standard: N/A 2. The central dogma describes which of the following? A. the process by which enzymes are modified after translation B. t...